DC Motors as Generators?
2009-09-23 18:49:00 Can all DC motors be used as generators? Series, shunt, PM, brushless?
Thermoelectric generators
2009-09-23 03:45:00 Germany automakers Volkswagen and BMW have developed thermoelectric generators (TEG) that recover waste heat from a combustion engine. According to a report by Prof. Rowe of the University of Wales in the International Thermoelectric Society, Volkswagen claims 600W output from the TEG under hig
Dynamic Breaking in Hydro Generators
2009-09-21 14:07:00 Dear All, By shorting Three phases of generator (Stator side) how Dynamic breaking is Acheived. What happens in the genetator so that rotor comes to zero speed? Regards, Vaithiyanathan
Turbo Chargers and Diesel Generators
2009-09-18 20:14:00 What is mean by turbo charger in diesel generator? hw much power it consumes?? is that power from fuel or any external ????
Capacitor-Excited Generators
2009-09-16 21:20:00 Hi All, Has anyone out there got a definitive explanation of how a capacitor regulated alternator (generator) works? I have repaired dozens of these little beasts, the biggest being about 20kW but I have never seen any explanation of their actual working principle. I have always th
1000 KVA Generators and 500 KVA Transformers
2009-09-16 08:08:00 I would like to know the statutory requirements for installing the 1000 KVA generators and 500 KVA transformers.
Generators and Diesel Consumption
2009-09-14 21:24:00 Can Someone tell me Approx Diesel Consumption/hr of a Genset running at approx 320A - 407V. The Genset Rating is 635KVA.
Multiple Generators and Unequal Loads
2009-09-08 10:37:00 we have a three generators ratings are 6.5MW,6.5MW . all are in synchronism. all generator outgoing are coming as a incomer in our substation.and incomers bus coupler is in on condition . and my question is my incomer saws a different load amp. HOW.why it is not share equal load.
Electric Generators - Combined Heat and Power
2009-08-20 19:08:00 I am looking for electric generators (IC or maybe small turbines, rated 480 VAC, 250-500 KW range or lower) with heat recovery "Built-in". Collect waste heat from water jacket and exhaust and then heat water (drinking water). Have you guys worked with units of this kind before?
Product Updates: Barcode Image Generators
2009-08-03 17:32:00 New updates in this 2009 release include better support of GS1-128, Data Matrix and MaxiCode barcodes and various performance improvements. This professional grade application is used to easily create and paste barcodes into other Windows applications or generate high quality graphic image files. Commonly used with PhotoShop, Quark and Publisher. Command line options are also available for creating bar codes in DOS. Easy-to-use features include settings and properties of the barcode are retained for ease of use, images are easily copied to the clipboard with one click for quick pasting into other applications, and the image file names may be auto generated from the data of the barcode to save time. A fully functional evaluation copy may be downloaded from http://www.idautomation.com/gen-erator/.
Variable Frequency Drives and Generators
2009-07-28 13:35:00 Yair... me agin'. I'm wondering can a smaller generator with an out put (say) 20% higher than the name plate rating on the driven motor be used to start a variable frequency drive. That is to say... can the drive be gradualy bought up to speed from the lowest frequency setting thus obviatin
Diesel Turbine Generators
2009-07-27 17:53:00 hi... i want to know that where the diesel turbine generator is manfactered most
Synchronizing Generators and Controllers
2009-07-26 17:50:00 hi all my name is nebiyou from ethiopia .i am trying to synchronize two 500kva generators with ig-cu or ig-nt (comapp) synchronizers.i have recently tried to synchronize two 500kva cummins generators with dkg 705 (datakom product)and it was succesesfull but i didnt test it with load.the com
Efficiency of 5 to 10 kw gasoline generators for home use
2009-07-13 03:23:00 For 100% efficient conversion you should get 38 kwh per gal of gasoline from these things. Anyone run a test on these small generators? Commercially generated power in the US goes from 10 to 40 cents/kwh, so these small inefficient engine/generators should cost more per kwh than this.
Efficiency of 5 to 10 KW Gasoline Generators for Residential Use
2009-07-13 03:23:00 For 100% efficient conversion you should get 38 kwh per gal of gasoline from these things. Anyone run a test on these small generators? Commercially generated power in the US goes from 10 to 40 cents/kwh, so these small inefficient engine/generators should cost more per kwh than this.
Flame Front Generators (FFG)
2009-07-06 15:24:00 flare system ignitor that we apply is flame front generator. the problem is clogged in flame front line which are carry the flame into the flare, my question is how to unclog this pipeline (flame front line)? base on your experienced...
PLC for Power Generators
2009-06-24 10:58:00 I HAVE A PLC OMRON CJIM CPU13, AND I HAAVE A LOW BATTERY ALARM BUT AFTER CHANGING THE BATTERY STILL HAVE THE ALARM AND IT IS REALY COMING FROM PLC O/P, THERE A SW FOR RAM POWER MUST TURNED ON AGAIN AFTER CHANGING THE BATTERY OR WHAT?? THERE IS NO REST BUTTOM, AND THIS PLC FOR POWER GENERATORS SO I
Sourcing Three-Phase Generators
2009-06-23 10:47:00 Dear Sir, Kindly can you inform me that is there any generator`s brand with this specifications: 3 phase / 220-240 V / 0.8 power factor / 15 KVA. Is it right 3 phase 220-240 voltage ? or it is single phase only Thanking you in advance .
Ultrasonic Generators
2009-06-18 19:15:00 i want a ultrasonic generator for my project work... i will use it only for the maximum distance of 3mts alone. so please help me where i can find it and how much it would cost.... i would like to know the cost including emmiter and reciver
Charging Sets vs. Charging Generators
2009-06-16 03:45:00 please give the differences between charging set and charging generator
Different protective relay system for synchronous generators operate in par
2009-06-11 06:14:00 Hi Guys. Would like to know in detail the different protective relay system for synchronous generators operating in parallel. I know that there is the Cross Current Compensation system, the differential current fault relay system and the overcurrent/earth fault protection system. I am
Protective Relays for Synchronous Generators Running in Parallel
2009-06-11 06:14:00 Hi Guys. Would like to know in detail the different protective relay system for synchronous generators operating in parallel. I know that there is the Cross Current Compensation system, the differential current fault relay system and the overcurrent/earth fault protection system.
Diesel Generators and Synchronization Problems
2009-06-10 15:53:00 Hi, I am new to this website, and I would like to ask anyone out there who has experience with generator synchronizing problems that I have encountered recently. 1. Background We have a two 350KVA diesel powered generators operating in paralllel as emergency backup system.
Should Mobile Power Generators be Grounded?
2009-06-10 05:14:00 Shouldn't mobile power generators be grounded? We use mobile power generators that are not grounded. They just roll in and we turn them on and connect to them. We ground the items we connect to but not the power generators.
How Does Cross-Current Compensation in Parallel Generators Work?
2009-06-09 10:05:00 Hi Guys. Would like to know how does the cross current compensation system of parallel generators work. I only know the fundamental principle of the system is that the system is there to allow generators in parallel to share reactive power in proportion to their rating.
Function Generators
2009-06-05 19:41:00 Hello Problem: I currently have to switch the knob of the power supply every second from 250mili amps to 90mili amps and it takes a while going from 250, 249,248....90. Hypothesis: If I use a function generator I can set it up, so it can do it for me. Situat
Generators and Power Plants
2009-06-05 17:48:00 Hello i'm electronics and telecom engg students.and facing difficulty in the following questions.Help me out.PLz give info about parallel operation of generators? and plz tell me about independent power plants .if u know some sites from where i can get complete info about my questions then plzzzz do
Synchronisation of generators
2009-06-03 08:27:00 explain me about the synchronisation of generators with ciruit diagram and with guard relay circuit.
Synchronizing Generators
2009-06-03 08:27:00 explain me about the synchronisation of generators with ciruit diagram and with guard relay circuit.
Reactive Power in AC Generators
2009-05-31 10:01:00 If one decreases (improves) only the reactive power on an AC Generator powered system does he improve the fuel consumption of that generator for the same active load? (assuming heat losses in cables are negligible because over rated) - thanks
about reactive power on synchronous generators
2009-05-30 01:30:00 I wonder if there is a reactive power when we have a resistive load in isolated operation how reactive power circulates, i mean if load has no a capacitive component how this reactive power goes and comes, also when we feed a d.c current to the excitation windings so what about the power consumption
Hydroelectric Generators and Mechanical Vibrations
2009-05-29 18:03:00 What is the allowable limit of the mechanical vibration in UGB(X,Y) & LGB(X,Y) axis of a Hydro Electric Generator with capacity 55-60 MW. How can we measure the vibration of the machine?. What are the possible reason for the high value in vibration ?. Is the excitation current having an
Help: Information about Parallel Operation of Generators
2009-05-12 21:36:00 Hi everybody, I hope everyone is good... I am currently a student of electrical engineer and I was assigned a report about Prallel operation of synchronous machines. To be frank, I am really laking even the basic information about this subject. Unfortunately, I also dont have good resource
Wells Wind Turbines vs. Savanious Wind Generators
2009-05-11 03:09:00 hi all; i was doing a project on wave energy and could not figure out a very small thing. Wave energy is slowly emerging and probably the most researched device is the OWC osscilating water column wave energy converter. It used the osscilating motion of the wave to induce an osscilating flow
Back Torque and Back Force in Linear Generators
2009-05-07 05:34:00 Hello, I am trying to understand the back torque (in circular generator) and back force (in linear generator). When you turn the dynamo, you apply some force. Different dynamos has different force requirements. 1) Do the back torque/force come from cogging force? 2) Is it induced
Generators and Excitation Protection
2009-05-06 09:27:00 We have 55MW Generator unit. It was tripped with under excitation protection. What is under excitation protection ?. What is its scheme and relay settings?. Generator output is 11 kv. RBN
220v/460v 3phase generators/motors
2009-04-19 15:09:00 hi gents i had seen dual voltage 3phase generators like caterpillar and dual voltage 3phase motors like marathon for example. on the generator i see the output voltage 240/480v and the amps 960/480Amps if its 400kva for example. regarding the connection tapping: the generator is 6 wi
Driving Compressors with Electric Motors or Diesel Generators
2009-04-10 13:23:00 Dear All Gurus, I have visit a plant which is generate thier own power supply by Disel Generators( parallel operation ) to run 3 units of 522Kw electrical drive centifugal compressor. My concern is if i change the electrical drive motor to disel engine which couple directly to comp
Power Ratings and Diesel Generators
2009-04-07 14:02:00 hii.. as a part of my project i am planning to synchronize 2 diesel generators of different power rating. The rest of the conditions are fine. Is there any precaution i need to take before doing this. I have synchronized 7 generators with same rating. but regarding the above said i am not sure.
Neutral Switch for Generators at Power Station
2009-04-07 03:50:00 Dear all Electrical Gurus, In one of my electrical power generation plant for glass container production ,i hv noticed there are 4 units of 640Kva DG in parallel (Sychronise) operation but only one of the neutral switch was in ON and three other unit were OFF position. Please advis
Parallel Generators and Ungrounded Stators
2009-03-25 08:02:00 How Earth fault can be detected on ungrounded stator when generators are running parellel with only one generator is grouned with resistance.
Alternative generators
2009-03-21 02:16:00 looking for an inexpensive generator that is used in windmills that stores/ converts kinetic energy into electricity. can anyone help???
Break-In Programs for Caterpillar Generators
2009-03-17 07:05:00 I work way out in Afghanistan where consulting peers is almost out of question. So here I am at CR4. With new manufacturing technologies, we tend to do things differently these days. I look after Caterpillar generators model 3456 (440KW, 400V), year of manufacture 2006 with electronic controls. In t
Diesel Generators - Schematics and Types
2009-03-04 07:46:00 I want ask u about Diesel generator components or parts. if thier any web site showing the construction of Diesel Generator; generally. and what the different between Prime DG & standby DG.
Diesel Generators and Power Factors
2009-02-26 07:57:00 when the diesel generator is switched on the power factor of the connected loads are decreasing as capacitor banks cannot be used. is there a method to improve the power factor of connected loads seperately when diesel generator is in use?
How to Test Capstone Micro Turbine Generators
2009-02-16 11:22:00 Hi Members, I'm offered to purchase 1 lot of used capstone Micro Turbine Natural Gas Generators , I plan to use them for my BioGas Renewable Energy Plant, the lot of Microturbine comes in 2 sizes C30 and C60, can anyone please provide some info on how to test the generators , they are now s
Shaft Generators/Synchronous Compensator
2009-02-09 20:06:00 I want to know how it works/inter connected. pls give ilustration if possible
backyard methane generators
2009-01-17 20:24:00 can anyone give me the specs. on how to build a methane generator like the ones they use in china? |
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